this derivation will be built:
  /nix/store/73lv7bd2slvnn9fbbmvd1411ygc2nqkd-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/73lv7bd2slvnn9fbbmvd1411ygc2nqkd-bcachefs-module-7.0.0-39-generic.drv'...